CN211039018U - Foam pump for fire control - Google Patents

Abstract

The utility model discloses a foam pump for fire fighting, which comprises a motor, a suction chamber, a sealing chamber and a discharge chamber. A bearing cover is installed at one end of the chamber, a packing gland is installed inside the suction chamber, a bearing cover is inserted through the motor output end and extends to the interior of the suction chamber, and a transmission shaft is connected, and one end of the transmission shaft penetrates the packing gland and passes through the coupling. An intermediate shaft is connected, the number of the couplings is two, the other end of the transmission shaft is connected with a rotor through another coupling, and a stator is sleeved outside the rotor. The utility model connects the transmission shaft and the rotor together through the intermediate shaft with the helical liquid feeding piece, so that the transmission shaft and the rotor can rotate synchronously, so as to achieve the purpose of effectively conveying the B-type foam, and in addition, the operation of the internal structure is more stable. It is not easy to wear and can improve the service life of the foam pump for fire fighting. Suitable for foam pumps.

Description

A fire-fighting foam pump

technical field

The utility model relates to the technical field of foam pumps, in particular to a foam pump for fire fighting.

Background technique

The foam pump is a device installed in a fire truck or other fire fighting equipment, and it is a special pump used to transport foam stock solution or other fire extinguishing liquids. The special fire-extinguishing foam is transported by the foam pump and mixed with water and air to form a special fire-extinguishing foam, which is covered on the combustible material to achieve rapid fire-extinguishing effect.

At present, most of the foam pumps used in domestically developed fire trucks are plunger pumps and vane pumps. The plunger pump is a positive displacement pump, which relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working cavity. The vane pump also belongs to the positive displacement pump, which works through the change of the working volume formed by the inner surface of the vane, the rotor and the stator. Piston pumps and vane pumps are simple to manufacture and easy to work, and are the choices of most domestic companies.

The above two kinds of foam pumps have good performance when conveying Class A foam liquid and water. However, when the working temperature is low, the B-type foam liquid is transported or the B-type foam liquid is not cleaned in time, which will cause the B-type foam to stick to the internal structure, which is easy to block and reduce the conveying efficiency.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a foam pump for fire fighting to achieve the purpose of improving efficiency.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a foam pump for fire fighting, comprising a motor, a suction chamber, a sealing chamber and a discharge chamber, the suction chamber is arranged on one side of the sealing chamber, and the associated discharge chamber is arranged on the sealing chamber. On the other side of the cavity, a bearing cover is installed at one end of the suction chamber, a packing gland is installed inside the suction chamber, and the motor output end runs through the bearing cover and extends to the interior of the suction chamber and is connected with a transmission shaft, and one end of the transmission shaft is connected An intermediate shaft is connected through the packing gland through a coupling, the number of which is two, the other end of the intermediate shaft is connected with a rotor through another coupling, and a stator is sleeved outside the rotor.

Preferably, the top of the suction chamber is provided with a liquid inlet, and the liquid inlet is inclined.

Preferably, a screw liquid inlet sheet is connected to the outside of the intermediate shaft.

Preferably, the suction chamber is divided into a left suction chamber and a right suction chamber.

Preferably, the drive shaft and the packing gland are located in the right suction chamber.

Preferably, the intermediate shaft and the two couplings are located in the left suction chamber.

Preferably, the liquid inlet is located above the left suction chamber, and the inclination angle of the liquid inlet is fifteen degrees to seventy-five degrees.

Preferably, both the rotor and the stator are located inside the sealed cavity.

Preferably, the spiral liquid inlet sheet is arranged in an arc shape.

The utility model provides a foam pump for fire fighting. Has the following beneficial effects:

(1) The utility model connects the transmission shaft and the rotor together through an intermediate shaft with a spiral liquid inlet sheet, so that the transmission shaft and the rotor can rotate synchronously, so as to achieve the purpose of effectively conveying the B-type foam, and also make the internal structure operate when working. It is more stable, not easy to wear, and improves the service life of the foam pump for fire fighting.

(2) The utility model has the characteristics of lightness, compactness, low cost, easy assembly and maintenance, etc., and is suitable for use in fire fighting, chemical industry, energy, papermaking and food. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the front view structure schematic diagram of the intermediate shaft;

Fig. 3 is the side view structure schematic diagram of the intermediate shaft;

FIG. 4 is a schematic diagram of the 45° axial side structure of the intermediate shaft.

In the picture: 1 discharge chamber, 2 rotor, 3 stator, 4 coupling, 5 liquid inlet, 6 intermediate shaft, 7 packing gland, 8 transmission shaft, 9 bearing cover, 10 motor.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

As shown in FIG. 1 , this embodiment provides a foam pump for fire protection, including a motor 10, a suction chamber, a sealing chamber and a discharge chamber 1. The suction chamber is arranged on one side of the sealing chamber, and the associated discharge chamber 1 is arranged on the sealing chamber. On the other side, a bearing cover 9 is fixedly installed at one end of the suction chamber, a packing gland 7 is fixedly installed inside the suction chamber, and a bearing cover 9 extends through the output end of the motor 10 and extends to the interior of the suction chamber, and a transmission shaft 8 is fixedly connected, and one end of the transmission shaft 8 is fixedly connected. Through the packing gland 7, an intermediate shaft 6 is fixedly connected through the coupling 4, and the outer part of the intermediate shaft 6 is fixedly connected with a screw liquid feeding piece, and the screw liquid feeding piece is arranged in an arc shape. The number of the coupling 4 is two, and the intermediate shaft 6 The other end is fixedly connected to the rotor 2 through another coupling 4. The rotor 2 is sleeved with a stator 3. Both the rotor 2 and the stator 3 are located inside the sealed cavity. The top of the suction chamber is provided with a liquid inlet 5, and the liquid inlet 5 is inclined. Setting, the suction chamber is divided into the left suction chamber and the right suction chamber, the transmission shaft 8 and the packing gland 7 are located in the right suction chamber, the intermediate shaft 6 and the two couplings 4 are located in the left suction chamber, and the liquid inlet 5 is located at the left suction chamber. Above the chamber, the inclination angle of the liquid inlet 5 is fifteen degrees to seventy-five degrees. To achieve synchronous rotation, to achieve the purpose of effectively conveying B-type foam, in addition, it also makes the internal structure work more smoothly, not easy to wear, and improves the service life of the fire-fighting foam pump. The structure of the intermediate shaft 6 of the liquid inlet sheet is because the existing foam pump transports the B-type foam liquid when the working temperature is low or the B-type foam liquid is not cleaned in time and is prone to blockage. The sleeve combination is less sensitive to foam viscosity, so it has better performance when conveying B-type foam with higher viscosity. The intermediate shaft structure of the sheet allows the B-type foam liquid to be cut and stirred by the screw inlet sheet before entering the suction cavity, and provides a forward thrust of the screw, which is convenient for the B-type foam liquid to be transported. It is light, compact, low-cost, and easy to assemble. Maintenance and other characteristics, suitable for fire fighting, chemical, energy, paper, food use. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

In use, when the motor 10 is started, the transmission shaft 8 connected to the motor 10 starts to rotate, and the intermediate shaft 6 with the helical liquid feeding sheet and the rotor 2 rotate synchronously through the coupling 4 . The rotor 2 rotates eccentrically inside the stator 3, and a vacuum is formed inside the suction chamber. The foam liquid enters the suction chamber from the inclined liquid inlet 5, and the spiral liquid inlet plate cuts and stirs the foam at a high speed. Finally, the foam passes through the intermediate shaft 6 and reaches the sealing chamber. , which are continuously and uniformly transported to the discharge chamber 1.

To sum up, the utility model connects the transmission shaft 8 and the rotor 2 together through the intermediate shaft 6 with the helical liquid feeding piece, so that the transmission shaft 8 and the rotor 2 can rotate synchronously, and the purpose of effectively conveying the B-type foam is achieved. It also makes the operation of the internal structure more stable, not easy to wear, and improves the service life of the foam pump for fire fighting.

It has the characteristics of lightness, compactness, low cost, easy assembly and maintenance, etc. It is suitable for fire fighting, chemical industry, energy, papermaking and food. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (9)

1. The utility model provides a foam pump for fire control, includes motor (10), suction chamber, seal chamber and discharge chamber (1), its characterized in that: the utility model discloses a suction chamber, including suction chamber, motor (10) output, bearing cap (8), transmission shaft (6), the quantity of shaft coupling (4) is two, the jackshaft (6) other end is connected with rotor (2) through another shaft coupling (4), rotor (2) outside cover is equipped with stator (3).

2. A fire fighting foam pump as defined in claim 1, wherein: the top of the suction chamber is provided with a liquid inlet (5), and the liquid inlet (5) is obliquely arranged.

3. A fire fighting foam pump as defined in claim 1, wherein: the outer part of the intermediate shaft (6) is connected with a spiral liquid inlet sheet.

4. A fire fighting foam pump as defined in claim 2, wherein: the suction chamber is divided into a left suction chamber and a right suction chamber.

5. A fire fighting foam pump as set forth in claim 4, characterized in that: the transmission shaft (8) and the packing gland (7) are positioned in the right suction chamber.

6. A fire fighting foam pump as set forth in claim 4, characterized in that: the middle shaft (6) and the two couplers (4) are both positioned in the left suction chamber.

7. A fire fighting foam pump as set forth in claim 4, characterized in that: the liquid inlet (5) is positioned above the left suction chamber, and the inclined angle of the liquid inlet (5) is fifteen-seventy-five degrees.

8. A fire fighting foam pump as defined in claim 1, wherein: and the rotor (2) and the stator (3) are both positioned in the sealed cavity.

9. A fire fighting foam pump as defined in claim 3, wherein: the spiral liquid inlet sheet is arranged in an arc shape.

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